Jim Ley wrote:
On Tue, 18 Oct 2005 20:16:56 +0200, "John of Aix"
wrote:

elyob wrote:
Anyway, what's the worries, they've got billions of cameras all over
the place recording your every move.

True but not quite the same. How much easier it would be to trace a
Londoner in his movements on public transport via a ticket machine
and his Oyster card use than have to pick him out from millions of
reels of video.

You don't have to pick him out for millions of reels of video, you
have to pick him out of one, then you can know his oyster ID even if
it's not registered...

Yes but it isn't a question of getting his card number, we're assuming
the've got that. I am saying that despite the zillions of cameras it
would be far easier to find his general movements through his Oyster
card use than trawling through reels of tapes to find where and when he
appears.